Frequency selective coupler
AssigneeQUALCOMM Incorporated
InventorsYu-Chun LIU, Xiaomin YANG, Arjun RAVINDRAN
Life of this patent
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Abstract
A frequency selective coupler configured as a harmonic rejection filter includes an electromagnetic element configured to electromagnetically couple to a signal path between an output of a power amplifier and an antenna, an impedance network coupled between an isolated port of the coupler and ground, the impedance network configured to provide a harmonic filter response, and an electrically unconnected coupled port connected to the electromagnetic element.
Claims30
A frequency selective coupler configured as a harmonic rejection filter, comprising:
- an electromagnetic element configured to electromagnetically couple to a signal path between an output of a power amplifier and an antenna;
- an impedance network coupled between an isolated port of the coupler and ground, the impedance network configured to provide a harmonic filter response;
- and
- an electrically unconnected coupled port connected to the electromagnetic element.
A frequency selective coupler associated with a filter, comprising:
- an electromagnetic element configured to electromagnetically couple to a signal path of a filter;
- an impedance network coupled between an isolated port of the coupler and ground, the impedance network configured to provide a filter response;
- and
- an electrically unconnected coupled port connected to the electromagnetic element.
A frequency selective coupler, comprising:
- an electromagnetic element configured to electromagnetically couple to a signal path;
- an impedance network coupled between an isolated port of the coupler and ground, the impedance network configured to selectively adjust a frequency at which the coupler provides a filter response;
- and
- an electrically unconnected coupled port connected to the electromagnetic element.
A method for providing signal rejection, comprising:
- electromagnetically coupling an electromagnetic element to a signal path;
- and
- selectively adjusting a frequency at which a filter response is provided to a signal on the signal path using a frequency selective coupler.
Dependencies are inferred from the claim text.